This is a simple framework, but it is loved by many. Breaking activities into segments (horizons) is a visual way to establish milestones. This is an alternative to a gantt chart or other timing chart. These series can also be used to establish a sequence of a trend, targets, or string of events that are measured by a non-data-driven x and y axis.

Other horizon series to review are CN015 and CN099.

There are a few ways to format these frameworks so they don't look so stark on the page. Refer to the tutorial for options.